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KV1.5 is a mammalian voltage dependent K+ channel, homologous to the Drosophila Shaker K+ channel. KV1.5 was first cloned from the rat brain.1 Eight Shaker related genes exist in mammals constituting the KV1, subfamily of the large KV channel family of genes.2
A functional KV1 channel is either a membrane spanning homotetramer or heterotetramer, which is composed of members of the same subfamily. In addition several auxiliary subunits and intracellular proteins might interact with the channel and affect its function.
The structure of KV1.5 channel is similar to all KV channels and includes six membrane spanning helices creating a voltage sensor domain and a pore domain.2
The channel is expressed in cardiac and smooth muscle tissue (colon, aorta, stomach and pulmonary artery) as well as in neurons and kidney.2 A loss-of-function mutation in the gene encoding the channel was found in atrial fibrillation patients, stressing its role as a cardiac action potential regulator.3
The functional channel is considered transient (A-type) channel and shows prominent inactivation. Therefore, this channel activity influences the membrane potential and excitability of neurons and muscle.
KV1.5 channels are sensitive to high doses of TEA (330 mM) and low doses of 4-AP (0.27 mM), the “classical” non-selective potassium channel blockers.2
Species reactivity key:
Immuno-colocalization of KV1.3 and KV1.5 in mouse cerebellumImmunohistochemical staining of mouse perfusion-fixed frozen brain sections using Anti-KV1.3 (KCNA3) (extracellular)-Biotin Antibody (#APC-101-B) (1:400), and Anti-KV1.5 (KCNA5)-ATTO-550 Antibody (#APC-004-AO), (1:60). A. KV1.3 staining (green) is detected in Bergmann glia soma and processes in the molecular layer (Mol) (arrow). B. Same section shows staining for KV1.5 (red). C. Merge of the two images suggests considerable co-localization in the soma of Bergmann glia. In the molecular layer, the distribution of KV1.5 is diffuse, unlike the discrete staining for KV1.3 in glial processes. Cell nuclei were visualized with DAPI (blue).
Anti-KV1.5 (KCNA5) Antibody (#APC-004) is a highly specific antibody directed against an epitope of the mouse protein. The antibody can be used in western blot, immunohistochemistry, immunocytochemistry, and immunoprecipitation applications. It has been designed to recognize KV1.5 from human, rat, and mouse samples.
Anti-KV1.5 (KCNA5)-ATTO-550 Antibody (#APC-004-AO) is directly labeled with an ATTO-550 fluorescent dye. ATTO dyes are characterized by strong absorption (high extinction coefficient), high fluorescence quantum yield, and high photo-stability. The ATTO-550 fluorescent label is related to the well known dye Rhodamine 6G and can be used with filters typically used to detect Rhodamine. Anti-KV1.5 (KCNA5)-ATTO-550 Antibody is specially suited to experiments requiring simultaneous labeling of different markers.
Products for control experiments
- Anti-KV1.5 (KCNA5) (extracellular) Antibody (#APC-150). This antibody recognizes a different epitope and thus can also be used as a control for detecting KV1.5.
Antibodies for live cell imaging experiments
- Anti-KV1.5 (KCNA5) (extracellular) Antibody (#APC-150). This antibody recognizes a an extracellular epitope and be used to detect KV1.5 in live cells.